btrfs: use existing device constraints table btrfs_raid_array

We should avoid duplicating the device constraints, let's use the
btrfs_raid_array in btrfs_check_raid_min_devices.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

1 files changed, 9 insertions, 14 deletions

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 6b38b72d678b..055fbebea199 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1731,6 +1731,7 @@ static int btrfs_check_raid_min_devices(struct btrfs_fs_info *fs_info,
 {
         u64 all_avail;
         unsigned seq;
+        int i;
 
         do {
                 seq = read_seqbegin(&fs_info->profiles_lock);
@@ -1740,22 +1741,16 @@ static int btrfs_check_raid_min_devices(struct btrfs_fs_info *fs_info,
                             fs_info->avail_metadata_alloc_bits;
         } while (read_seqretry(&fs_info->profiles_lock, seq));
 
-        if ((all_avail & BTRFS_BLOCK_GROUP_RAID10) && num_devices < 4) {
-                return BTRFS_ERROR_DEV_RAID10_MIN_NOT_MET;
-        }
-
-        if ((all_avail & BTRFS_BLOCK_GROUP_RAID1) && num_devices < 2) {
-                return BTRFS_ERROR_DEV_RAID1_MIN_NOT_MET;
-        }
+        for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) {
+                if (!(all_avail & btrfs_raid_group[i]))
+                        continue;
 
-        if ((all_avail & BTRFS_BLOCK_GROUP_RAID5) &&
-            fs_info->fs_devices->rw_devices < 2) {
-                return BTRFS_ERROR_DEV_RAID5_MIN_NOT_MET;
-        }
+                if (num_devices < btrfs_raid_array[i].devs_min) {
+                        int ret = btrfs_raid_mindev_error[i];
 
-        if ((all_avail & BTRFS_BLOCK_GROUP_RAID6) &&
-            fs_info->fs_devices->rw_devices < 3) {
-                return BTRFS_ERROR_DEV_RAID6_MIN_NOT_MET;
+                        if (ret)
+                                return ret;
+                }
         }
 
         return 0;